Exhaust roof cap



FIG. 1 is a perspective view, taken from the top and rear, of an exhaust roof cap, showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and

FIG. 7 is a left side elevational view thereof. 

The ornamental design for an exhaust roof cap, as shown. 